US Central Time to Canada Atlantic Time
Convert times between US Central Time (CST, UTC-6:00) and Canada Atlantic Time (AST, UTC-4:00). Canada Atlantic Time is 2 hours ahead of US Central Time in standard time.
UTC-6:00 / -5:00→UTC-4:00 / -3:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| US Central Time | CST / CDT | UTC-6:00 | UTC-5:00 | United States |
| Canada Atlantic Time | AST / ADT | UTC-4:00 | UTC-3:00 | Canada |
* DST offset applies during summer months. Exact transition dates vary by year.
Standard Time Conversion (CST → AST)
| US Central Time | Canada Atlantic Time |
|---|---|
| 12:00 AM CST | 2:00 AM AST |
| 6:00 AM CST | 8:00 AM AST |
| 9:00 AM CST | 11:00 AM AST |
| 12:00 PM CST | 2:00 PM AST |
| 3:00 PM CST | 5:00 PM AST |
| 6:00 PM CST | 8:00 PM AST |
| 9:00 PM CST | 11:00 PM AST |
Daylight Saving Time (DST) Notes
- US Central Time observes DST. Clocks advance 1 hour to CDT (UTC-5:00) roughly from month 3 to 11.
- Canada Atlantic Time observes DST. Clocks advance 1 hour to ADT (UTC-3:00) roughly from month 3 to 11.
Frequently Asked Questions
How do I convert CST to AST?
Add 2 hours to the CST time to get AST. For example, 9:00 AM CST = 11:00 AM AST.
What is the current UTC offset for US Central Time?
US Central Time is UTC-6:00 during standard time (CST) and UTC-5:00 during summer daylight saving time (CDT).
Is Canada Atlantic Time ahead or behind US Central Time?
Canada Atlantic Time is 2 hours ahead of US Central Time in standard time.
When is a good time to schedule a meeting between CST and AST?
A good overlap window is around 9:00 AM CST / 11:00 AM AST, which falls within business hours for both timezones.
Related Timezone Conversions
US Central Time → US Eastern TimeCST / ESTUS Central Time → US Mountain TimeCST / MSTUS Central Time → US Pacific TimeCST / PSTUS Central Time → US Alaska TimeCST / AKSTUS Central Time → Hawaii TimeCST / HSTUS Central Time → Greenwich Mean TimeCST / GMTUS Central Time → India Standard TimeCST / ISTUS Central Time → China Standard TimeCST / CST
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.